[fortran, patch] Make VOLATILE conflict with program name

[Paul Thomas]

Tobias,

This is clearly OK for trunk.

Thanks

Paul
> :ADDPATCH fortran:
>
> currently, one can write:
>   program test
>     volatile :: test
> which does not make much sense.
>
> Added patch adds conf(volatile_) to:
>     case FL_PROGRAM:
>     case FL_BLOCK_DATA:
>     case FL_MODULE:
>     case FL_LABEL:
>
> Ok for the trunk?
> Regtested on x86_64-unknown-linux-gnu
>
> Tobias
>   
> ------------------------------------------------------------------------
>
> fortran/
> 2006-11-20  Tobias Burnus  <burnus@net-b.de>
>
> 	* symbol.c (check_conflict): Add conflict between VOLATILE
> 	  attribute and program name.
>
> testsuite/
> 2006-11-20  Tobias Burnus  <burnus@net-b.de>
>
> 	* gfortran.dg/volatile3.f90: Add conflict test.
>
> Index: gcc/fortran/symbol.c
> ===================================================================
> *** gcc/fortran/symbol.c	(Revision 119016)
> --- gcc/fortran/symbol.c	(Arbeitskopie)
> *************** check_conflict (symbol_attribute * attr,
> *** 432,437 ****
> --- 448,454 ----
>         conf2 (dimension);
>         conf2 (dummy);
>         conf2 (save);
> +       conf2 (volatile_);
>         conf2 (pointer);
>         conf2 (target);
>         conf2 (external);
> Index: gcc/testsuite/gfortran.dg/volatile3.f90
> ===================================================================
> *** gcc/testsuite/gfortran.dg/volatile3.f90	(Revision 119016)
> --- gcc/testsuite/gfortran.dg/volatile3.f90	(Arbeitskopie)
> *************** program volatile_test
> *** 13,18 ****
> --- 13,19 ----
>     real, volatile,volatile :: r = 3. ! { dg-error "Duplicate VOLATILE attribute" }
>     volatile :: l,n ! { dg-error "Duplicate VOLATILE attribute" }
>     volatile ! { dg-error "Syntax error in VOLATILE statement" }
> +   volatile :: volatile_test ! { dg-error "PROGRAM attribute conflicts with VOLATILE attribute" }
>     l = 4.0
>     m = 3.0
>   contains
>